We join with you in prayer for your son's healing and restoration. God's will is for your son to be healed and whole. First, it is important to ensure there is nothing blocking prayers for healing. Let's pray that if there is anything that needs to be forgiven or repented of that the Holy Spirit would reveal it.
Let's pray:
"Father in heaven We cry out to you on behalf of this beloved mother and her son. Lord, You said in Your Word, 'I am Yahweh who heals you' (Exodus 15:26 WEB). We claim Your promise for this child, trusting that You are still the God who heals. Touch his body, Father, and drive out the fever and flu that plague him. We rebuke the spirit of infirmity, commanding it to leave. We call Jesus Christ the divine healer. Thank you for your faith mother who is praying in Jesus Name.
We also pray believing according to James 5:15,16 WEB, 'and the prayer of faith will save him who is sick, and the Lord will raise him up. If he has committed sins, he will be forgiven. The effective, earnest prayer of a righteous person is powerfully effective.'"
Continue to trust in God's goodness and faithfulness. Stand on His Word, and declare your son's healing until you see it manifest. Remember, Jesus said, "If you remain in me, and my words remain in you, you will ask whatever you desire, and it will be done for you" (John 15:7 WEB). Thank you for praying in Jesus Name. Keep praying and believing.